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RHEL 7 : dhcp (RHSA-2016:2590)

medium Nessus Plugin ID 94553

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

An update for dhcp is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. The dhcp packages provide a relay agent and ISC DHCP service required to enable and administer DHCP on a network.

Security Fix(es) :

* A resource-consumption flaw was discovered in the DHCP server. dhcpd did not restrict the number of open connections to OMAPI and failover ports. A remote attacker able to establish TCP connections to one of these ports could use this flaw to cause dhcpd to exit unexpectedly, stop responding requests, or exhaust system sockets (denial of service). (CVE-2016-2774)

Red Hat would like to thank ISC for reporting this issue.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 Release Notes linked from the References section.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2016:2590

https://access.redhat.com/security/cve/cve-2016-2774

Plugin Details

Severity: Medium

ID: 94553

File Name: redhat-RHSA-2016-2590.nasl

Version: 2.15

Type: local

Agent: unix

Published: 11/4/2016

Updated: 10/24/2019

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:7.4, cpe:/o:redhat:enterprise_linux:7.5, cpe:/o:redhat:enterprise_linux:7.7, p-cpe:/a:redhat:enterprise_linux:dhcp, cpe:/o:redhat:enterprise_linux:7.6, p-cpe:/a:redhat:enterprise_linux:dhclient, p-cpe:/a:redhat:enterprise_linux:dhcp-common, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:7.3, p-cpe:/a:redhat:enterprise_linux:dhcp-libs, p-cpe:/a:redhat:enterprise_linux:dhcp-debuginfo, p-cpe:/a:redhat:enterprise_linux:dhcp-devel

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 11/3/2016

Vulnerability Publication Date: 3/9/2016

Reference Information

CVE: CVE-2016-2774

RHSA: 2016:2590